Question

用VB编写程序实现两种屏幕分辨率的切换，程序怎么编。

我习惯用1280*1024。
可有个东西要把分辨率调到800*600才能全屏。都是32位的。
能不能帮我编个程序，实现两种分辨率的快速切换呢？

就是在桌面上点一下图标出来一个VB程序，窗体上可以有两个按钮，一个写大，一个写小，点不同按钮就切换到不同分辨率。也可以只用一个按钮，点一次换一下分辨率。

Answer 1

'原则上，只改这一次，下一次开机会还原，但如果需重开机，才会Update
'Registry中的设定，并重开机。
'如果要永久设定其设定值，请将
'b = ChangeDisplaySettings(DevM, 0) 改成
'b = ChangeDisplaySettings(DevM, CDS_UPDATEREGISTRY)

Option Explicit
Private Declare Function EnumDisplaySettings Lib "user32" Alias _
"EnumDisplaySettingsA" (ByVal lpszDeviceName As Long, _
ByVal iModeNum As Long, lpDevMode As Any) As Long

Private Declare Function ChangeDisplaySettings Lib "user32" Alias _
"ChangeDisplaySettingsA" (lpDevMode As Any, ByVal dwflags As Long) As Long
Private Declare Function ExitWindowsEx Lib "user32" (ByVal uFlags As Long, _
ByVal dwReserved As Long) As Long

Const EWX_REBOOT = 2 ' 重开机
Const CCDEVICENAME = 32
Const CCFORMNAME = 32
Const DM_PELSWIDTH = &H80000
Const DM_PELSHEIGHT = &H100000

Const DISP_CHANGE_SUCCESSFUL = 0
Const DISP_CHANGE_RESTART = 1
Const CDS_UPDATEREGISTRY = 1

Private Type DEVMODE
dmDeviceName As String * CCDEVICENAME
dmSpecVersion As Integer
dmDriverVersion As Integer
dmSize As Integer
dmDriverExtra As Integer

dmFields As Long
dmOrientation As Integer
dmPaperSize As Integer
dmPaperLength As Integer
dmPaperWidth As Integer
dmScale As Integer
dmCopies As Integer
dmDefaultSource As Integer
dmPrintQuality As Integer
dmColor As Integer
dmDuplex As Integer
dmYResolution As Integer
dmTTOption As Integer
dmCollate As Integer

dmFormName As String * CCFORMNAME
dmUnusedPadding As Integer
dmBitsPerPel As Integer
dmPelsWidth As Long
dmPelsHeight As Long
dmDisplayFlags As Long
dmDisplayFrequency As Long
End Type
Private DevM As DEVMODE

Private Sub Form_Load()
On Error Resume Next
Dim i As Long
Dim b As Long
Dim ans As Long
Dim a As Long

a = EnumDisplaySettings(0, 0, DevM) 'Initial Setting

DevM.dmFields = DM_PELSWIDTH Or DM_PELSHEIGHT
DevM.dmPelsWidth = 1024 '设定成想要的分辨率
DevM.dmPelsHeight = 768
b = ChangeDisplaySettings(DevM, 0) 'Changed Only this time
If b = DISP_CHANGE_RESTART Then
ans = MsgBox("要重开机设定才能完成，重开？", vbOKCancel)
If ans = 1 Then
b = ChangeDisplaySettings(DevM, CDS_UPDATEREGISTRY)
'after this , Will Update in Registry
Call ExitWindowsEx(EWX_REBOOT, 0)
End If
Else
If b <> DISP_CHANGE_SUCCESSFUL Then
Call MsgBox("设定有误", vbCritical)
End If
End If

End
End Sub

Answer 2

微软有提供一个api的，
函数名字我也记不清楚了，到我空间搜索一下

Answer 3

我也想知道这点，我一直在寻找源码，就是找不到，希望LZ找到后顺便告诉我，谢谢！